Final day of pre-season testing
Sebastian Vettel fastest in the morning
Vettel tests 'halo' head protection device
Transmission problem for Hamilton before lunch
Get involved #worsteverF1mods
Right, time for me to call it a day.
Forty hours of writing about F1 testing may sound like a lot, but the excellent memes and humour you've all provided have helped make it fly by.
I can't wait to do it all again in two weeks time.
Keep an eye on Andrew Benson's testing review online later and I'll be back for Australian Grand Prix practice on 18 March. Hopefully see you then.
1 Sebastian Vettel (Ger) Ferrari 1:22.852
2 Carlos Sainz (Spa) Toro Rosso 1:23.134
3 Felipe Massa (Brz) Williams 1:23.644
4 Sergio Perez (Mex) Force India 1:23.721
5 Lewis Hamilton (GB) Mercedes 1:24.133
6 Daniel Ricciardo (Rus) Red Bull 1:24.427
7 Jenson Button (GB) McLaren 1:24.714
8 Jolyon Palmer (GB) Renault 1:24.859
9 Marcus Ericsson (Swe) Sauber 1:25.031
10 Romain Grosjean (Fra) Haas 1:25.255
11 Esteban Gutierrez (Spa) Haas 1:25.422
12 Rio Haryanto (Idn) Manor 1:25.899
13 Nico Rosberg (Ger) Mercedes 1:26.140
Vettel, Massa, Perez, Palmer and Gutierrez set their best times on the super-soft tyre, Sainz, Button and Haryanto on the ultra-aoft, Ricciardo, Ericsson, and Grosjean on the soft and the Mercedes drivers on the medium
A cheeky improvement from Nico Rosberg at the end there with 1:26.140. It is not enough to move him off the bottom of the timesheet.
Sebastian Vettel finishes the final day of the final test fastest.
That's it. Testing is over for 2016.
On to Australia...
And now, the end is near...
It looks like for the second day in a row it will be a Ferrari that will top the timesheet.
Esteban Gutierrez climbs a pace into 11th as a run on the super softs produces a 1:25.422.
There's unlikely to be any drastic changes on the timesheet, Jenson Button has those ultras on but no improvement on his time set on the same compound earlier.
What have you learnt from testing?
Twenty minutes to go and Jenson Button is cracking on with an ultra soft tyre run.
He has Felipe Massa, Nico Rosberg, Carlos Sainz and Sebastian Vettel for company on the track.
Cheers Emily, we've had fun too. Although we may have to rein in our appreciation of the great man...
Jenson Button has been quietly going about his business on track. He's just completed his 60th lap of the afternoon - five short of race distance in Barcelona.
Meanwhile, a personal best for the day from Esteban Gutierrez - 1:26.555. He's still 12th fastest.
What have you learnt from testing?
1. Sebastian Vettel 1:22.852 121 laps
2. Carlos Sainz 1:23.134 97 laps
3. Felipe Massa 1:23.644 112 laps
4. Sergio Perez 1:23.721 60 laps
5. Lewis Hamilton 1:24.133 69 laps
6. Daniel Ricciardo 1:24.427 110 laps
7. Jenson Button 1:24.714 102 laps
8. Jolyon Palmer 1:24.859 73 laps
9. Marcus Ericsson 1:25.031 108 laps
10. Romain Grosjean 1:25.255 66 laps
11. Rio Haryanto 1:25.899 45 laps
12. Esteban Gutierrez 1:26.899 5 laps
13. Nico Rosberg 1:28.165 29 laps
Nico Rosberg is on the slide again.
Esteban Gutierrez is swiftly on board with a timed lap - a 1:26.899 - and that puts him 12th on the timesheet, ahead of the Mercedes driver.
Yes Andy! Top work.
Andrew Benson
Chief F1 writer
Britain’s newest F1 driver, Jolyon Palmer has not had the easiest of pre-seasons. He has done about two-fifths of the mileage of team-mate Kevin Magnussen in the Renault as a result of reliability problems. This, he said, had been “a little bit disastrous to be honest” and “it is obviously not what you want when you are a rookie trying to turn up in Melbourne and do a good job”.
However, it’s not all bad news. Palmer says the “base-line car is reasonable” and “at least I have the experience from last year to fall back on”, when he was Lotus’s reserve driver and ran in several practice sessions.
“If we can work on a bit more this afternoon I am quite confident to turn up to Melbourne and it will be alright.” Palmer has added more than 30 laps to his tally already since lunch, so it’s not looking too bad.